7th International Conference on Attosecond Science and Technology

Session

Time delays and dynamics of photoionization in atoms and molecules

3 Jul 2019, 16:15

University of Szeged Congress Centre

309. Photoionization Dynamics Probed by Attosecond Pulses

Prof. Anne L'Huillier (Lund University)

03/07/2019, 16:15

invited talks

We introduce the concept of photoionization time delay and present measurements in different atomic systems, with high spectral resolution. Both non-resonant and resonant photoionization dynamics will be considered.

130. Fano's Propensity Rule in Angle Resolved Attosecond Pump-probe Photionization

David Busto (Lund University)

03/07/2019, 16:45

oral

We extend Fano’s propensity rule to two-photon above-threshold ionization and apply it to angle-resolved attosecond interferometry. This results in incomplete interference which lead to angle-dependent photoionization time delays and delay-dependent photoelectron angular distributions.

91. RABBITT Attoclock for the Direct Measurement of Ionization Phases

Stefan Donsa (Vienna University of Technology)

03/07/2019, 17:00

oral

Using a circularly polarized Attosecond Pulse Train (APT) together with a weak replica of the circularly polarized fundamental Infra-Red (IR) we reconstruct the ionization phase of the (2s2p)$^1$P$^{\mathrm{o}}$ resonance in atomic Helium by analyzing the photelectron momentum distribution.

277. Atomic and Orientation-Dependent Molecular Ionization Times from an Attoclock with Bicircular Fields

Prof. Manfred Lein (Leibniz Universität Hannover)

03/07/2019, 17:15

oral

Tailored bicircular fields mimic linearly polarized light three times per period, while avoiding recollision and interferences. Combined with streaking, we extract momentum-dependent times of strong-field ionization even in the previously inaccessible range of rising field.

114. Time Delays from One-photon Transitions in the Continuum

Mr Jaco Fuchs (ETH Zürich)

03/07/2019, 17:30

oral

We experimentally resolve a time delay of electron wave packets arising from one-photon transitions in the continuum. This proves the influence of the outgoing wave packet spatial expansion on the photoionization delay.

123. Attosecond Photoionization Delays around the Argon Cooper Minimum

Mr Dominique Platzer (CEA, CNRS, Université Paris-Saclay)

03/07/2019, 17:45

oral

Photoionization time delays between the 3s and 3p subshells of argon have been measured over a large energy range (34-70 eV) covering the Cooper minima in both subshells, providing stringent tests for interchannel correlation theories.